Entomology Commons^™

Global Population Genetic Structure And Demographic Trajectories Of The Black Soldier Fly, Hermetia Illucens, Cengiz Kaya, Tomas N. Generalovic, Gunilla Ståhls, Martin Hauser, Ana C. Samayoa, Carlos G. Nunes-Silva, Heather Roxburgh, Jens Wohlfahrt, Ebenezer A. Ewusie, Marc Kenis, Yupa Hanboonsong, Jesus Orozco, Nancy Carrejo, Satoshi Nakamura, Laura Gasco, Santos Rojo, Chrysantus M. Tanga, Rudolf Meier, Clint Rhode, Christine J. Picard, Chris D. Jiggins, Florian Leiber, Jeffery K. Tomberlin, Martin Hasselmann, Wolf U. Blanckenhorn, Martin Kapun, Christoph Sandrock

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Background: The black soldier fly (Hermetia illucens) is the most promising insect candidate for nutrient-recycling through bioconversion of organic waste into biomass, thereby improving sustainability of protein supplies for animal feed and facilitating transition to a circular economy. Contrary to conventional livestock, genetic resources of farmed insects remain poorly characterised. We present the first comprehensive population genetic characterisation of H. illucens. Based on 15 novel microsatellite markers, we genotyped and analysed 2862 individuals from 150 wild and captive populations originating from 57 countries on seven subcontinents. Results: We identified 16 well-distinguished genetic clusters indicating substantial global population structure. The data …

Whole Genome Comparisons Reveal Panmixia Among Fall Armyworm (Spodoptera Frugiperda) From Diverse Locations, Katrina A. Schlum, Kurt Lamour, Caroline Placidi De Bortoli, Rahul Banerjee, Robert Meagher, Eliseu Pereira, Maria Gabriela Murua, Gregory A. Sword, Ashley E. Tessnow, Diego Viteri Dillon, Angela M. Linares Ramirez, Komivi S. Akutse, Rebecca Schmidt-Jeffris, Fangneng Huang, Dominic Reisig, Scott J. Emrich, Juan Luis Jurat-Fuentes

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Background: The fall armyworm (Spodoptera frugiperda (J.E. Smith)) is a highly polyphagous agricultural pest with long-distance migratory behavior threatening food security worldwide. This pest has a host range of > 80 plant species, but two host strains are recognized based on their association with corn (C-strain) or rice and smaller grasses (R-strain). The population genomics of the United States (USA) fall armyworm remains poorly characterized to date despite its agricultural threat. Results: In this study, the population structure and genetic diversity in 55 S. frugiperda samples from Argentina, Brazil, Kenya, Puerto Rico and USA were surveyed to further our understanding of …

A System Dynamics Model For Pests And Natural Enemies Interactions, Bonoukpoè Mawuko Sokame, Henri E.Z. Tonnang, Sevgan Subramanian, Anani Y. Bruce, Thomas Dubois, Sunday Ekesi, Paul André Calatayud

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Stemborers (Busseola fusca, Sesamia calamistis and Chilo partellus), the fall armyworm (Spodoptera frugiperda) and associated parasitoids constitute an interacting system in maize fields in Kenya. This work aims at developing and evaluating models that represent the evolution of those interactions by applying system thinking and system dynamics approaches with its archetypes [causal loop diagram (CLD), reinforcing (R) and balancing (B)] to analyse the population of these multi-species systems. The software Vensim PLE 8.0.9 was used to implement the models and carry out the simulations of single- and multi-species systems. The results showed that when a single pest species with its …

Field Evaluation Of A New Third Generation Push-Pull Technology For Control Of Striga Weed, Stemborers, And Fall Armyworm In Western Kenya, Duncan Cheruiyot, Frank Chidawanyika, Charles A.O. Midega, Jimmy O. Pittchar, John A. Pickett, Zeyaur R. Khan

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Production of cereal crops in sub-Saharan Africa is threatened by parasitic striga weeds and attack by stemborers and the invasive fall armyworm (FAW), compounded by increasing hot and dry conditions. A climate-smart push-pull technology (PPT) significantly reduces effects of these biotic challenges. To improve further resilience of the system to climate change, more adapted and suitable companion plants were identified and integrated in a new version of PPT, termed 'third generation PPT'. Our study evaluates field performance and farmer opinions of this new version in comparison with the earlier version, climate-smart PPT, and farmers' own practices of growing maize in …

Occurrence, Diversity And Distribution Of Trypanosoma Infections In Cattle Around The Akagera National Park, Rwanda, S. Richard Gashururu, Ndichu Maingi, Samuel M. Githigia, Methode N. Gasana, Peter O. Odhiambo, Dennis O. Getange, Richard Habimana, Giuliano Cecchi, Weining Zhao, James Gashumba, Joel L. Bargul, Daniel K. Masiga

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Background African Trypanosomiases threaten the life of both humans and animals. Trypanosomes are transmitted by tsetse and other biting flies. In Rwanda, the African Animal Trypanosomiasis (AAT) endemic area is mainly around the tsetse-infested Akagera National Park (NP). The study aimed to identify Trypanosoma species circulating in cattle, their genetic diversity and distribution around the Akagera NP. Methodology A cross-sectional study was carried out in four districts, where 1,037 cattle blood samples were collected. The presence of trypanosomes was determined by microscopy, immunolog-ical rapid test VerY Diag and PCR coupled with High-Resolution Melt (HRM) analysis. A parametric test (ANOVA) was …

Satellite-Based Modelling Of Potential Tsetse (Glossina Pallidipes) Breeding And Foraging Sites Using Teneral And Non-Teneral Fly Occurrence Data, Stella Gachoki, Thomas Groen, Anton Vrieling, Michael Okal, Andrew Skidmore, Daniel Masiga

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Background: African trypanosomiasis, which is mainly transmitted by tsetse flies (Glossina spp.), is a threat to public health and a significant hindrance to animal production. Tools that can reduce tsetse densities and interrupt disease transmission exist, but their large-scale deployment is limited by high implementation costs. This is in part limited by the absence of knowledge of breeding sites and dispersal data, and tools that can predict these in the absence of ground-truthing. Methods: In Kenya, tsetse collections were carried out in 261 randomized points within Shimba Hills National Reserve (SHNR) and villages up to 5 km from the reserve …

Global Overview Of Locusts As Food, Feed And Other Uses, J. P. Egonyu, S. Subramanian, C. M. Tanga, T. Dubois, S. Ekesi, S. Kelemu

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The term 'locusts' refers to insect species which can aggregate into migratory swarms that cause wide-scale destruction of crops and pasture, causing significant effect to food security. This review assesses the potential of harnessing locust swarms for beneficial uses. Among 21 known locusts, ~10 species have been traditionally consumed by humans or fed to animals for millennia in 65 countries. Their nutritional composition is comparable or superior to that of conventional meat. However, insecticide residues, microbial contaminants and allergens may compromise their safety. Some countries have developed regulations on edible insects, locusts inclusive. Safe and efficient harvest of locusts could …

Mating Behaviour, Mate Choice And Female Resistance In The Bean Flower Thrips (Megalurothrips Sjostedti), Adeyemi O. Akinyemi, Sevgan Subramanian, David K. Mfuti, Tom W. Pope, Amanuel Tamiru, William D.J. Kirk

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Many species of thrips (Thysanoptera) in the family Thripidae form mating aggregations, but the adaptive significance of these aggregations and the extent of male and female mate choice is poorly understood. We studied the mating behaviour of the bean flower thrips Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), which forms male aggregations and occurs across sub-Saharan Africa. We tested whether males choose mates by female age or mating status. No-choice mating bioassays with one male and one female were used to simulate the way males usually encounter only one female at a time in aggregations in the field. Virgin females violently resisted …

Root Exudate Chemical Cues Of An Invasive Plant Modulate Oviposition Behavior And Survivorship Of A Malaria Mosquito Vector, Trizah K. Milugo, David P. Tchouassi, Reginald A. Kavishe, Rhoel R. Dinglasan, Baldwyn Torto

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Gravid female Anopheles gambiae mosquitoes identify suitable oviposition sites through a repertoire of cues, but the influence of allelochemicals, especially root phytochemicals in modulating this behavior and impacting subsequent progeny bionomics remains unexplored. We addressed these questions in the malaria vector Anopheles gambiae and its invasive host plant Parthenium hysterophorus. Using chemical analysis combined with laboratory behavioral assays, we demonstrate that a blend of terpenes, namely α-pinene, α-phellandrene, β-phellandrene, 3-carene and (E)-caryophyllene emitted from P. hysterophorus root exudate treated-water attracted gravid females. However, fewer eggs (55%) hatched in this treatment than in control water (66%). The sesquiterpene lactone parthenin, identified …

An Update On The Distribution Of Glossina (Tsetse Flies) At The Wildlife-Human-Livestock Interface Of Akagera National Park, Rwanda, Richard S. Gashururu, Samuel M. Githigia, Methode N. Gasana, Richard Habimana, Ndichu Maingi, Giuliano Cecchi, Massimo Paone, Weining Zhao, Daniel K. Masiga, James Gashumba

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Background: Glossina (tsetse flies) biologically transmit trypanosomes that infect both humans and animals. Knowledge of their distribution patterns is a key element to better understand the transmission dynamics of trypanosomosis. Tsetse distribution in Rwanda has not been well enough documented, and little is known on their current distribution. This study determined the current spatial distribution, abundance, diversity, and seasonal variations of tsetse flies in and around the Akagera National Park. Methods: A longitudinal stratified sampling following the seasons was used. Biconical traps were deployed in 55 sites for 6 consecutive days of each study month from May 2018 to June …

Water Immersion Tolerance By Larval Instars Of Stable Fly, Stomoxys Calcitrans, L1758 (Diptera: Muscidae) Impairs The Fitness Performance Of Their Subsequent Stages, Steve B.S. Baleba

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Background: In holometabolous insects, environmental factors experienced in pre-imaginal life stages affect the life-history traits within that stage and can also influence subsequent life stages. Here, I assessed tolerance to water immersion by the larval instars of the stable fly, Stomoxys calcitrans L. (Diptera: Muscidae) and its impact on the life-history traits of their subsequent life stages. Results: After submerging the three larval instars of S. calcitrans in distilled water, I found that the first instar larvae remained active for longer as compared to the second and third instar larvae. Also, the first instar larvae took a longer period to …

Molecular Detection Of Leishmania Donovani, Leishmania Major, And Trypanosoma Species In Sergentomyia Squamipleuris Sand Flies From A Visceral Leishmaniasis Focus In Merti Sub-County, Eastern Kenya, Barrack O. Owino, Jackline Milkah Mwangi, Steve Kiplagat, Hannah Njiriku Mwangi, Johnstone M. Ingonga, Alphine Chebet, Philip M. Ngumbi, Jandouwe Villinger, Daniel K. Masiga, Damaris Matoke-Muhia

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Background: Visceral leishmaniasis (VL) and zoonotic cutaneous leishmaniasis (ZCL) are of public health concern in Merti sub-County, Kenya, but epidemiological data on transmission, vector abundance, distribution, and reservoir hosts remain limited. To better understand the disease and inform control measures to reduce transmission, we investigated the abundance and distribution of sand fly species responsible for Leishmania transmission in the sub-County and their blood-meal hosts. Methods: We conducted an entomological survey in five villages with reported cases of VL in Merti sub-County, Kenya, using CDC miniature light traps and castor oil sticky papers. Sand flies were dissected and identified to the …

Mitogenomic Analysis Of Diversity Of Key Whitefly Pests In Kenya And Its Implication To Their Sustainable Management, Fathiya M. Khamis, Fidelis L.O. Ombura, Inusa J. Ajene, Komivi S. Akutse, Sevgan Subramanian, Samira A. Mohamed, Thomas Dubois, Chrysantus M. Tanga, Sunday Ekesi

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Whiteflies (Hemiptera: Aleyrodidae) are devastating agricultural pests of economic importance vectoring pathogenic plant viruses. Knowledge on their diversity and distribution in Kenya is scanty, limiting development of effective sustainable management strategies. The present study is aimed at identifying whitefly pest species present in Kenya across different agroecological zones and establish predictive models for the most abundant species in Africa. Whiteflies were sampled in Kenya from key crops known to be severely infested and identified using 16S rRNA markers and complete mitochondrial genomes. Four whitefly species were identified: Aleyrodes proletella, Aleurodicus dispersus, Bemisia afer and Trialeurodesvaporariorum, the latter being the most …

Insect Flower-Visitors Of African Oil Palm Elaeis Guineensis At Different Sites And Distances From Natural Vegetation In Uganda, James Peter Egonyu, Stephen Erisa Sisye, John Baguma, Milton Otema, Gabriel Ddamulira

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This survey aimed at generating information to guide improvement of oil palm fruit-set in Uganda by testing the hypothesis that diversity and abundance of oil palm insect flower-visitors were influenced by sampling site, distance from natural vegetation and flower sex. Sampling was done on male and female oil palm flowers from (i) five oil palm experimental fields in different districts and (ii) oil palm plantations on Bugala Island on Lake Victoria. The plantations on Bugala Island were subdivided into near (0–15 m) and far (100–200 m) from natural vegetation. We recorded 162,677 insects in 23 morpho-species, dominated by weevils in …

Gene Co-Expression Network Analysis Of Trypanosoma Brucei In Tsetse Fly Vector, Kennedy W. Mwangi, Rosaline W. Macharia, Joel L. Bargul

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Background: Trypanosoma brucei species are motile protozoan parasites that are cyclically transmitted by tsetse fly (genus Glossina) causing human sleeping sickness and nagana in livestock in sub-Saharan Africa. African trypanosomes display digenetic life cycle stages in the tsetse fly vector and in their mammalian host. Experimental work on insect-stage trypanosomes is challenging because of the difficulty in setting up successful in vitro cultures. Therefore, there is limited knowledge on the trypanosome biology during its development in the tsetse fly. Consequently, this limits the development of new strategies for blocking parasite transmission in the tsetse fly. Methods: In this study, RNA-Seq …

Transcriptomic Response Of Anopheles Gambiae Sensu Stricto Mosquito Larvae To Curry Tree (Murraya Koenigii) Phytochemicals, Clarence M. Mang’Era, Fathiya M. Khamis, Erick O. Awuoche, Ahmed Hassanali, Fidelis Levi Odhiambo Ombura, Paul O. Mireji

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Background: Insect growth regulators (IGRs) can control insect vector populations by disrupting growth and development in juvenile stages of the vectors. We previously identified and described the curry tree (Murraya koenigii (L.) Spreng) phytochemical leaf extract composition (neplanocin A, 3-(1-naphthyl)-l-alanine, lumiflavine, terezine C, agelaspongin and murrayazolinol), which disrupted growth and development in Anopheles gambiae sensu stricto mosquito larvae by inducing morphogenetic abnormalities, reducing locomotion and delaying pupation in the mosquito. Here, we attempted to establish the transcriptional process in the larvae that underpins these phenotypes in the mosquito. Methods: We first exposed third-fourth instar larvae of the mosquito to the …

Plant Nutrient Quality Impacts Survival And Reproductive Fitness Of The Dengue Vector Aedes Aegypti, Vincent Odhiambo Nyasembe, David Poumo Tchouassi, Martha Njeri Muturi, Christian W.W. Pirk, Catherine L. Sole, Baldwyn Torto

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Background: In a recent study using DNA barcoding, we identified the plants fed upon by four Afro-tropical mosquito species that vector dengue, malaria, and Rift Valley fever. Herein, we have expanded on this study by investigating the role of three of the plants, Pithecellobium dulce (Fabaceae), Leonotis nepetifolia (Lamiaceae), and Opuntia ficus-indica (Cactaceae), on the survival, fecundity, and egg viability of the dengue vector Aedes aegypti. Methods: We tested these effects using females that received (i) an initial three rations of blood meals and (ii) no blood meal at all. Two controls were included: age-matched females fed on glucose solution …

Revealing The Native Status Of Conyza Bonariensis: Specialization Of Insect Herbivores Associated With Conyza And Erigeron Spp. (Asteraceae) In Louisiana, Texas, And Mississippi, Carlos Wiggins

LSU Master's Theses

Flaxleaf fleabane [Conyza bonariensis (L.) Cronquist] (Asterales: Asteraceae) is an annual herb which grows up to 1.0 m in height and is native to South America. Due to introduction and subsequent development of herbicide resistance, C. bonariensis has become a major agricultural weed in Australia. The purpose of this study was to catalog herbivorous insects associated with local populations of C. bonariensis in Louisiana, Texas and Mississippi in order to establish comparisons with the Australian fauna and identify potential biological control agents. Leaves, roots, stems, and flowers of C. bonariensis were inspected for signs of insects and pathogens. Results …

Cognitive Ecology Of Color Vision In Orchid Bees, Andreia Queiroz Santos A Figueiredo

Dissertations

Animals interact with their environment and acquire information from it. Information can be processed by their sensory systems and influence behavior, often mediated through mechanisms of decision-making and learning. Animal pollinators acquire information from flowers and use this information to make decisions about the flowers they visit. My research aimed to understand the role of color vision in a tropical pollinator, the orchid bee Euglossa dilemma. Chapter 1 is a review exploring pollination through the lens of prepared learning. Prepared learning proposes that animals learn some associations better than others due to an evolved match with the environment. I …

The First Record Of The Jumping Bristletail Pedetontus Gershneri Allen, 1995 (Microcoryphia: Machilidae) From Alabama, Usa Significantly Extends Its Known Range, Alexander B. Orfinger, Grant D. De Jong

Insecta Mundi

The jumping bristletail Pedetontus gershneri Allen, 1995 (Microcoryphia: Machilidae) is reported from the state of Alabama, USA, for the first time, extending its known range east-southeast by roughly 588 km. The first partial mtDNA barcode was generated for the species. Notes on color variation and sampling needs of Microcoryphia are briefly discussed.

The Microcoryphia (=Archaeognatha, or jumping bristletails) are a small order of insects with about 500 nominal species worldwide (Mendes 1990). The North American fauna includes 30 named species (De Jong 2020), with additional species expected to be discovered and described (Bowser 2019). Numerous records of species in the …

Survey Of The Attelabidae Of Wisconsin (Coleoptera: Curculionoidea), Julia Janicki, Daniel K. Young

Insecta Mundi

A statewide survey of Wisconsin’s Attelabidae (Coleoptera: Curculionoidea) was conducted over one full (2012) and two partial (2011, 2013) field seasons. Specimens were collected using a variety of techniques. Fourteen species of Attelabidae in nine genera placed in two subfamilies are now recorded from Wisconsin, with five new state species records and 117 new Wisconsin county records. Generic and species-level keys for Wisconsin attelabid species are provided along with generic and species diagnoses. Species treatments also include a synonymy, a description, and information on natural history, phenology, distribution and collecting methods. Dorsal and lateral habitus images are also provided for …

A New Neotropical Predaceous Midge In The Genus Parabezzia Malloch From Guerrero, Mexico, And A Second Mexican Record Of P. Alexanderi Wirth (Diptera: Ceratopogonidae: Ceratopogoninae: Ceratopogonini), Herón Huerta, Gustavo R. Spinelli, William L. Grogan Jr.

Insecta Mundi

We describe and illustrate a new Neotropical predaceous midge, Parabezzia carlae Huerta, Spinelli and Grogan, new species (Diptera: Ceratopogonidae) from males collected by Malaise trap in La Union, Ayutla de los Libres, state of Guerrero, Mexico. We also report a second record of P. alexanderi Wirth from Veracruz, Mexico. A key to the known species in Mexico is included.

Se describe e ilustra una especie nueva de mosquita predadora de la región Neotropical, Parabezzia carlae Huerta, Spinelli y Grogan, nueva especie (Diptera: Ceratopogonidae) sobre la base de machos colectados con trampa Malaise procedentes de La Unión, Ayutla de Los Libres, …

Two New Species Of Nothochodaeus Nikolajev, 2005 From Palawan Island, Philippines (Coleoptera: Scarabaeoidea: Ochodaeidae), Jean-Bernard Huchet

Insecta Mundi

Nothochodaeus minotaurus Huchet, new species, and N. huxleyi Huchet, new species (Coleoptera: Scarabaeoidea: Ochodaeidae), from Palawan Island, Philippines, are described and illustrated.

Following my study of the Ochodaeidae of the Philippine archipelago (Huchet 2014a, 2014b, 2017, 2018, 2019), I describe here two new species of the genus Nothochodaeus Nikolajev, respectively N. minotaurus Huchet, new species, and N. huxleyi Huchet, new species, bringing to four species, all endemic, the representatives of this genus in the archipelago. Both species described here are illustrated and compared with their closest relatives. These new species originate from the island of Palawan. This discovery …

A New Species Of Leptorhyparus Howden, 2003 (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini) In Amber From The Dominican Republic, With Comments On Extant Species, Paul E. Skelley

Insecta Mundi

A new species of Leptorhyparus Howden, 2003 (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini) is described, Leptorhyparus quadricornis Skelley, in amber from the Dominican Republic. Extant species of Leptorhyparus are reviewed, with additional collection data and diagnostic characters presented.

Se describe una nueva especie en el género Leptorhyparus Howden, 2003 (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini), Leptorhyparus quadricornis Skelley, en ámbar de la República Dominicana. Se revisan las especies vivientes del género Leptorhyparus, agregándose datos de colección y caracteres diagnósticos.

Endophytic Colonisation Of Solanum Lycopersicum And Phaseolus Vulgaris By Fungal Endophytes Promotes Seedlings Growth And Hampers The Reproductive Traits, Development, And Survival Of The Greenhouse Whitefly, Trialeurodes Vaporariorum, Vongai M. Paradza, Fathiya M. Khamis, Abdullahi A. Yusuf, Sevgan Subramanian, Sunday Ekesi, Komivi S. Akutse

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In the scope of mitigating the negative impacts of pesticide use and managing greenhouse whiteflies, Trialeurodes vaporariorum sustainably, 16 endophytic fungal isolates from five different genera (Beauveria, Trichoderma, Hypocrea, Bionectria, and Fusarium) were screened for their ability to colonise two preferred host plant species, namely, tomato (Solanum lycopersicum L.) and French bean (Phaseolus vulgaris L.), through seed inoculation. Seven and nine isolates were endophytic to P. vulgaris and S. lycopersicum, respectively, where significant differences in the endophytic colonisation rates were observed among the fungal isolates in P. vulgaris and its plant parts, with a significant interaction between the isolates and …

New Genus Of Rhyparini (Coleoptera: Scarabaeidae: Aphodiinae) In Amber From The Dominican Republic, Paul E. Skelley

Insecta Mundi

Priscyparus quisqueyensis Skelley, new genus and new species (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini), is described in amber from the Dominican Republic. An updated key to New World genera of Rhyparini is presented.

Priscyparus quisqueyensis Skelley, género nuevo y especie nueva (Coleoptera: Scarabaeidae: Aphodiinae: Rhyparini), se describe de ámbar de la República Dominicana. La clave a los Rhyparini del Nuevo Mundo es enmendada para incluir el nuevo género.

There are only three fossil taxa of Rhyparini (Coleoptera: Scrabaeidae: Aphodiinae) preserved in copal or amber from the New World. There have been brief listings of a Termitodius Wasmann in Colombian copal (Penney and …

Response Of Roseau Cane (Phragmites Australis) To Two Biotic Stresses: Hyalopterus Pruni And Bipolaris Yamadae, Heather E. Cizek

LSU Master's Theses

Roseau cane (Phragmites australis) is considered an invasive plant because of its ability to replace native plant species. However, in Louisiana it plays an important role protecting coastal infrastructure and being part of the marsh ecosystem in the lower Mississippi River Delta. In recent years, Roseau cane has been affected by a die-off, a problem that has also been reported in some European countries. Possible biotic and abiotic factors that have been associated with the die-off include scale insects, climate change, pollution, salinity levels, and pathogens.

In this research, the individual and combined effect of a foliar disease …

Improving The Deployment Of Insecticidal Seed Treatments In Louisiana Rice In Accordance With Integrated Pest Management, Megan Marie Mulcahy

LSU Doctoral Dissertations

Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is the most destructive insect pest of rice in the United States. Lissorhoptrus oryzophilus larvae feed on rice roots, reducing yields by up to 25 %. Lepidopteran stem borers, in the family Crambidae, are also economically important pests of rice in Louisiana.

Currently, insecticidal seed treatments are used throughout the U.S. Mid-south rice industry to prophylactically control L. oryzophilus. Chlorantraniliprole seed treatments are also effective against stem borers. Thus, insecticidal seed treatments are used on >80 % of Louisiana rice acreage. Although seed treatments reduce damage inflicted by these pests, they are applied preventatively …

Biocontrol Of The Emerald Ash Borer: An Adapted Nicholson-Bailey Model, Michael Kerckhove, Shuheng Chen

Annual Symposium on Biomathematics and Ecology Education and Research

No abstract provided.

Regional Expansion And Evaluation Of Potential Chemical Control For Invasive Apple Snails (Pomacea Maculata) In Southwest Louisiana, Julian M. Lucero

LSU Master's Theses

The integration of monitoring and chemical control is an efficient strategy for managing invasive apple snails, Pomacea maculata, in the rice (Oryza sativa L.) and crawfish systems of southwest Louisiana. However, their current distribution, expansion rates, and susceptibility to chemical control methods in this area are not well known. This study evaluated the expansion of P. maculata in southwest Louisiana and assessed potential chemical control for P. maculata among toxicity assays using various application rates. The effects of potential chemical control were also assessed on a non-target species, the red swamp crawfish (Procambarus clarkii). P. maculata …